SpongeGame.java

class MinecraftVersionImpl implements MinecraftVersion {
	private final static String NAME = "@MC_VERSION@";
	private final static boolean LEGACY = false;

	private MinecraftVersionImpl() {}

	@Override
	public String getName() {
		return MinecraftVersionImpl.NAME;
	}

	@Override
	public boolean isLegacy() {
		return MinecraftVersionImpl.LEGACY;
	}

	@Override
	public int compareTo(MinecraftVersion minecraftVersion) {
		return 0;
	}
}

// SpongeGame class
@Override
public MinecraftVersion getMinecraftVersion() {
    // I need to return an instance here...
}